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Tytuł pozycji:

Non-hierarchical cluster analysis for determination of resistance to worm infection in meat sheep.

Tytuł:
Non-hierarchical cluster analysis for determination of resistance to worm infection in meat sheep.
Autorzy:
Araujo JIM; Graduate Program in Animal Science, State University of Southwest of Bahia, Campus of Itapetinga, Itapetinga, Bahia, Brazil. .
da Silva Santos NP; Department of Agronomy, Federal University of Piauí, Campus Professora Cinobelina Elvas, BR 135, Km 3, Bom Jesus, Piauí, Teresina, Brazil.
de Oliveira MB; Department of Statistics , Federal University of Piauí , Campus Universitário Ministro Petrônio Portella, Teresina, Piauí, Brazil.
Sena LS; Department of Animal Science, Agrarian Sciences Center, Federal University of Piauí, Campus Universitário Ministro Petrônio Portella, Teresina, Piauí, Brazil.
Biagiotti D; Technical College of Bom Jesus, Federal University of Piauí, Campus Professora Cinobelina Elvas, BR 135, Km 3, Piauí, Bom Jesus, Brazil.
de Araujo Rego Neto A; Department of Animal Science, Agrarian Sciences Center, Federal University of Piauí, Campus Universitário Ministro Petrônio Portella, Teresina, Piauí, Brazil.
Sarmento JLR; Department of Animal Science, Agrarian Sciences Center, Federal University of Piauí, Campus Universitário Ministro Petrônio Portella, Teresina, Piauí, Brazil.
Źródło:
Tropical animal health and production [Trop Anim Health Prod] 2020 Nov 20; Vol. 53 (1), pp. 16. Date of Electronic Publication: 2020 Nov 20.
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Publication: 2005- : Heidelberg : Springer
Original Publication: Edinburgh, Livingstone.
MeSH Terms:
Disease Resistance/*immunology
Helminthiasis, Animal/*immunology
Intestinal Diseases, Parasitic/*veterinary
Sheep Diseases/*immunology
Animals ; Body Constitution/physiology ; Brazil ; Helminthiasis, Animal/parasitology ; Hematologic Tests/veterinary ; Intestinal Diseases, Parasitic/immunology ; Intestinal Diseases, Parasitic/parasitology ; Sheep ; Sheep Diseases/parasitology ; Sheep, Domestic
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Contributed Indexing:
Keywords: FEC; Multivariate analysis; Ovis aries; Parasite control; Selection; k-means
Entry Date(s):
Date Created: 20201120 Date Completed: 20210225 Latest Revision: 20210519
Update Code:
20240105
DOI:
10.1007/s11250-020-02484-3
PMID:
33216227
Czasopismo naukowe
The aim of this study was to determine the resistance to worm infection in Santa Inês sheep by combining different sets of gastrointestinal parasite resistance indicator traits, using the k-means algorithm. Records from 221 animals reared in the Mid-North sub-region of Brazil were used. The following phenotypes were used: hematocrit (HCT); white blood cell count; red blood cell count (RBC); hemoglobin (HGB); platelets; mean corpuscular hemoglobin; mean corpuscular volume; mean corpuscular hemoglobin concentration; fecal egg count (FEC); coloration of the ocular mucosa (FAMACHA score); body condition score (BCS); withers height; and rump height. Two files with phenotypic information of animals were edited: complete, including all traits, and reduced, in which only FAMACHA score, HCT, FEC, and BCS were used. For determination of worm resistance, three groups were formed using the k-means non-hierarchical clustering by combining the traits of the complete and reduced analyses. The animals of the group in which individuals had the lowest values for FEC and FAMACHA score, as well as the highest values for HCT, RBC, HGB, and BCS were classified as resistant. In the group with opposite values for the aforementioned traits, the animals were classified as sensitive. The animals of the group with values between the other two groups were classified as moderately resistant. The results obtained in complete and reduced analyses were equivalent. Thus, it is possible to identify animals of the Santa Inês sheep breed according to their status of resistance to worm infection based on a reduced trait set.

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